This was the case for 2022 WJ1 detected on November 19 by the Catalina Sky Survey in Arizona at 04:53 Universal Time. Three more sightings followed, providing enough data for European Space Agency (ESA) software to calculate an impact risk of about 20 % within 2 to 3 hours. Very quickly, dozens of additional observations (a coordinated global network exists) refined the result and 2022 WJ1 burned up as it passed over Lakes Erie and Ontario, not far from the Canada – United States border. The asteroid having an estimated width of 1 m, it presented no danger . This is the sixth time that automatic sky monitoring telescopes have detected an asteroid before it entered our atmosphere.